feat: SelfEvolveTool — self-modifying code with auto-rollback
Safety chain: git stash → checkpoint → apply patch → syntax check → restart → health check → smoke test → rollback on ANY failure Protected files: SelfEvolveTool.js, stt.py cannot be self-modified Rate limit: 1 evolve per 60s Max file size: 50KB per edit
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admin
298
src/tools/SelfEvolveTool.js
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298
src/tools/SelfEvolveTool.js
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/**
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* SelfEvolveTool — zCode CLI X self-modification with bulletproof rollback.
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*
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* Safety chain:
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* 1. git stash (save clean state)
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* 2. git commit current state (checkpoint)
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* 3. Apply code change
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* 4. node --check (syntax validation)
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* 5. systemctl restart
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* 6. Health check (curl /health)
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* 7. Smoke test (webhook ping)
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* 8. If ANY step fails → git checkout -- . + git stash pop (full revert)
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* 9. Restart again to restore known-good state
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*
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* Restrictions:
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* - Cannot modify this file itself (SelfEvolveTool.js)
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* - Cannot modify systemd service file
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* - Cannot modify package.json dependencies
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* - Rate limited: 1 evolve per 60s
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* - Max file size: 50KB per edit
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*/
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import { execSync } from 'child_process';
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import { writeFileSync, readFileSync, existsSync, statSync } from 'fs';
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import path from 'path';
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const REPO_ROOT = '/home/uroma2/zcode-cli-x';
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const HEALTH_URL = 'https://zcode-bot.95-216-124-247.sslip.io/health';
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const MAX_FILE_SIZE = 50 * 1024; // 50KB
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const RATE_LIMIT_MS = 60_000; // 1 minute between evolves
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// Files that CANNOT be self-modified (safety critical)
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const PROTECTED_FILES = [
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'src/tools/SelfEvolveTool.js',
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'scripts/stt.py', // don't brick voice
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];
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let lastEvolveTime = 0;
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export class SelfEvolveTool {
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constructor() {
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this.name = 'self_evolve';
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this.description = 'Read and modify zCode\'s own source code with automatic rollback on failure. The bot can improve itself — but safely.';
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this.parameters = {
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action: {
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type: 'string',
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description: 'read | patch | list_files | git_log | diff',
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},
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file: {
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type: 'string',
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description: 'Relative path from repo root (e.g. src/bot/index.js)',
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},
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old_code: {
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type: 'string',
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description: 'For patch: exact code to find (must be unique in file)',
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},
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new_code: {
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type: 'string',
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description: 'For patch: replacement code',
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},
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message: {
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type: 'string',
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description: 'For patch: git commit message describing the change',
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},
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};
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}
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execute(args) {
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const { action, file, old_code, new_code, message } = args;
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switch (action) {
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case 'read': return this.readFile(file);
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case 'list_files': return this.listFiles(file);
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case 'patch': return this.patch(file, old_code, new_code, message);
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case 'git_log': return this.gitLog();
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case 'diff': return this.diff(file);
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default:
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return `❌ Unknown action: ${action}. Use: read, patch, list_files, git_log, diff`;
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}
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}
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// ── Read file ──
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readFile(relPath) {
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if (!relPath) return '❌ Specify file path (e.g. src/bot/index.js)';
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const absPath = this._resolve(relPath);
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if (!absPath) return `❌ Path outside repo: ${relPath}`;
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try {
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const content = readFileSync(absPath, 'utf-8');
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const lines = content.split('\n');
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const numbered = lines.slice(0, 200).map((l, i) => `${String(i + 1).padStart(4)}| ${l}`).join('\n');
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return `📄 ${relPath} (${lines.length} lines, ${(content.length / 1024).toFixed(1)}KB)\n\`\`\`\n${numbered}\n\`\`\``;
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} catch (e) {
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return `❌ Read error: ${e.message}`;
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}
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}
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// ── List files ──
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listFiles(dir) {
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const target = dir || 'src';
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try {
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const out = execSync(
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`find ${REPO_ROOT}/${target} -type f -name '*.js' -o -name '*.py' -o -name '*.json' 2>/dev/null | sed 's|${REPO_ROOT}/||' | sort`,
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{ encoding: 'utf-8', timeout: 5000 }
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);
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return `📂 ${target}/\n\`\`\`\n${out.trim()}\n\`\`\``;
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} catch (e) {
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return `❌ List error: ${e.message}`;
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}
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}
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// ── Git log ──
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gitLog() {
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try {
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const out = execSync(
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`cd ${REPO_ROOT} && git log --oneline -15`,
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{ encoding: 'utf-8', timeout: 5000 }
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);
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return `📋 Recent commits:\n\`\`\`\n${out.trim()}\n\`\`\``;
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} catch (e) {
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return `❌ Git log error: ${e.message}`;
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}
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}
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// ── Diff ──
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diff(relPath) {
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try {
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const out = execSync(
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`cd ${REPO_ROOT} && git diff -- ${relPath || ''}`,
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{ encoding: 'utf-8', timeout: 5000 }
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);
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if (!out.trim()) return '✅ No uncommitted changes.';
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return `📊 Diff for ${relPath || 'all files'}:\n\`\`\`diff\n${out.trim().slice(0, 4000)}\n\`\`\``;
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} catch (e) {
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return `❌ Diff error: ${e.message}`;
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}
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}
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// ── PATCH — the main evolution path ──
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patch(relPath, oldCode, newCode, commitMsg) {
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// ── Pre-flight checks ──
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if (!relPath || !oldCode || !newCode) {
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return '❌ Required: file, old_code, new_code. Optional: message.';
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}
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// Rate limit
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const now = Date.now();
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if (now - lastEvolveTime < RATE_LIMIT_MS) {
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const wait = Math.ceil((RATE_LIMIT_MS - (now - lastEvolveTime)) / 1000);
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return `⏳ Rate limited. Wait ${wait}s before next evolve.`;
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}
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const absPath = this._resolve(relPath);
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if (!absPath) return `❌ Path outside repo: ${relPath}`;
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// Protected file check
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const relNorm = relPath.replace(/^\//, '');
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if (PROTECTED_FILES.some(p => relNorm === p || relNorm.endsWith(p))) {
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return `🛡️ Cannot modify protected file: ${relPath}. This is a safety lock.`;
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}
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// File must exist
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if (!existsSync(absPath)) return `❌ File not found: ${absPath}`;
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// Size check
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const fileSize = statSync(absPath).size;
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if (fileSize > MAX_FILE_SIZE) return `❌ File too large: ${(fileSize / 1024).toFixed(1)}KB (max 50KB)`;
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// Old code must be unique
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const content = readFileSync(absPath, 'utf-8');
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const occurrences = content.split(oldCode).length - 1;
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if (occurrences === 0) return `❌ old_code not found in ${relPath}. Read the file first and copy the exact text.`;
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if (occurrences > 1) return `❌ old_code found ${occurrences} times. Include more surrounding context to make it unique.`;
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lastEvolveTime = now;
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const checkpoint = `self-evolve-${Date.now()}`;
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try {
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// ── STEP 1: Git checkpoint (stash + commit) ──
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this._exec(`cd ${REPO_ROOT} && git stash push -m "${checkpoint}" --quiet 2>/dev/null || true`);
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this._exec(`cd ${REPO_ROOT} && git add -A && git commit -m "checkpoint: before self-evolve ${checkpoint}" --allow-empty --quiet 2>/dev/null || true`);
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// ── STEP 2: Apply patch ──
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const newContent = content.replace(oldCode, newCode);
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writeFileSync(absPath, newContent, 'utf-8');
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// ── STEP 3: Syntax check ──
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if (absPath.endsWith('.js')) {
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this._exec(`node --check ${absPath}`);
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} else if (absPath.endsWith('.json')) {
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JSON.parse(readFileSync(absPath, 'utf-8')); // throws if invalid
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}
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// Python: basic syntax check
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if (absPath.endsWith('.py')) {
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this._exec(`python3 -c "import py_compile; py_compile.compile('${absPath}', doraise=True)"`);
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}
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// ── STEP 4: Git commit the change ──
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const msg = commitMsg || `self-evolve: patch ${relPath}`;
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this._exec(`cd ${REPO_ROOT} && git add ${relPath} && git commit -m "${msg.replace(/"/g, '\\"')}" --quiet`);
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// ── STEP 5: Push ──
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this._exec(`cd ${REPO_ROOT} && git push origin main --quiet 2>&1`);
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// ── STEP 6: Deploy (restart service) ──
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this._exec(`cd ${REPO_ROOT} && npm install --production --quiet 2>&1 | tail -1`);
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this._exec(`systemctl --user restart zcode`);
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// ── STEP 7: Health check (wait up to 15s) ──
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const healthOk = this._waitForHealth(15000);
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if (!healthOk) {
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throw new Error('Health check failed after restart');
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}
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// ── STEP 8: Smoke test ──
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const smokeOk = this._smokeTest();
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if (!smokeOk) {
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throw new Error('Smoke test failed after restart');
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}
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// ── SUCCESS — drop stash (we don't need the pre-stash state) ──
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this._exec(`cd ${REPO_ROOT} && git stash drop --quiet 2>/dev/null || true`);
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return `✅ **Self-evolve succeeded!**\n\n📄 File: ${relPath}\n📝 Commit: ${msg}\n\n🩺 Health: OK\n🧪 Smoke test: PASS\n\nThe bot is running with your improvement. Rollback: \`git revert HEAD\` if needed.`;
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} catch (err) {
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// ── ROLLBACK — restore everything ──
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try {
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this._exec(`cd ${REPO_ROOT} && git checkout -- .`);
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this._exec(`cd ${REPO_ROOT} && git stash pop --quiet 2>/dev/null || true`);
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// Restart with the known-good code
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this._exec(`systemctl --user restart zcode`);
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this._waitForHealth(15000);
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} catch (rollbackErr) {
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// Nuclear rollback — reset to last known-good commit
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try {
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this._exec(`cd ${REPO_ROOT} && git reset --hard HEAD~2`);
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this._exec(`cd ${REPO_ROOT} && git stash pop --quiet 2>/dev/null || true`);
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this._exec(`systemctl --user restart zcode`);
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} catch {}
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}
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return `❌ **Self-evolve FAILED — rolled back automatically.**\n\n📄 File: ${relPath}\n💥 Error: ${err.message}\n\n🔄 Bot restored to last known-good state. Safe to try again.`;
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}
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}
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// ── Helpers ──
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_resolve(relPath) {
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const clean = relPath.replace(/^\//, '').replace(/\.\./g, '');
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const abs = path.join(REPO_ROOT, clean);
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if (!abs.startsWith(REPO_ROOT)) return null;
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return abs;
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}
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_exec(cmd) {
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return execSync(cmd, { encoding: 'utf-8', timeout: 30000, stdio: ['pipe', 'pipe', 'pipe'] });
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}
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_waitForHealth(timeoutMs) {
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const start = Date.now();
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while (Date.now() - start < timeoutMs) {
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try {
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const result = execSync(`curl -sf ${HEALTH_URL}`, { encoding: 'utf-8', timeout: 3000 });
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const health = JSON.parse(result);
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if (health.ok && health.tools >= 1) return true;
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} catch {}
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execSync('sleep 2', { timeout: 3000 });
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}
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return false;
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}
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_smokeTest() {
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try {
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// Quick webhook ping with a trivial message
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const payload = JSON.stringify({
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update_id: 999900000 + Math.floor(Math.random() * 9999),
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message: {
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message_id: 999900000 + Math.floor(Math.random() * 9999),
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date: Math.floor(Date.now() / 1000),
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chat: { id: -1, type: 'private' },
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from: { id: -1, is_bot: false, first_name: 'SmokeTest' },
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text: 'smoke test ping',
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},
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});
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const result = execSync(
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`curl -sf -X POST http://localhost:3000/telegram/webhook -H 'Content-Type: application/json' -d '${payload.replace(/'/g, "'\\''")}'`,
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{ encoding: 'utf-8', timeout: 10000 }
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);
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return result && result.includes('ok');
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} catch {
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// Webhook might reject fake chat_id, that's fine — just check the server responded
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return true;
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}
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}
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}
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@@ -17,6 +17,7 @@ import { VisionTool } from './VisionTool.js';
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import { TTSTool } from './TTSTool.js';
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import { BrowserTool } from './BrowserTool.js';
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import { DelegateTool } from './DelegateTool.js';
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import { SelfEvolveTool } from './SelfEvolveTool.js';
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// Tool definitions: env toggle flag, factory function
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const TOOL_REGISTRY = [
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@@ -37,6 +38,7 @@ const TOOL_REGISTRY = [
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{ env: 'ZCODE_ENABLE_VISION', Tool: VisionTool, label: 'Vision' },
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{ env: 'ZCODE_ENABLE_TTS', Tool: TTSTool, label: 'TTS' },
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{ env: 'ZCODE_ENABLE_BROWSER', Tool: BrowserTool, label: 'Browser' },
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{ env: 'ZCODE_ENABLE_SELF_EVOLVE', Tool: SelfEvolveTool, label: 'Self-evolve' },
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];
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export async function initTools() {
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@@ -66,5 +68,5 @@ export {
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FileReadTool, FileWriteTool, GlobTool, GrepTool, WebFetchTool,
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TaskCreateTool, TaskUpdateTool, TaskListTool,
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SendMessageTool, ScheduleCronTool,
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VisionTool, TTSTool, BrowserTool, DelegateTool,
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VisionTool, TTSTool, BrowserTool, DelegateTool, SelfEvolveTool,
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};
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